<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stipe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染 二级 三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染 二级 权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditRolesDialog(scope.row.id)"
            >编辑</el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRolesById(scope.row.id)"
            >删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
            >权限分配</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRolesDialogVisible"
      width="50%"
      @close="addRolesDialogClosed"
    >
      <!-- 内容主题区域 -->
      <el-form
        :model="addRolesForm"
        :rules="addRolesFormRules"
        ref="addRolesFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRolesInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRolesDialogVisible"
      width="50%"
      @close="editRolesDialogClosed"
    >
      <el-form
        :model="editRolesForm"
        :rules="editRolesFormRules"
        ref="editRolesFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="权限分配"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],

      // 控制添加角色对话框的显示与隐藏
      addRolesDialogVisible: false,
      // 控制添加角色的表单数据
      addRolesForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色时候的表单验证规则
      addRolesFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
      },

      // 控制编辑角色对话框的显示与隐藏
      editRolesDialogVisible: false,
      // 查询到的用户的信息
      editRolesForm: {},
      // 编辑角色表单的验证规则对象
      editRolesFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
      },

      // 控制权限分配对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件树形的绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败！')
      }
      this.rolelist = res.data
      //   console.log(this.rolelist)
    },
    // 监听添加角色对话框的关闭事件
    addRolesDialogClosed() {
      this.$refs.addRolesFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    async addRolesInfo() {
      const { data: res } = await this.$http.post('roles', this.addRolesForm)
      // console.log(res)
      if (res.meta.status !== 201) {
        this.$message.error('角色添加失败！')
      }
      this.$message.success('角色添加成功！')
      // 角色添加成功之后，隐藏添加角色的对话框
      this.addRolesDialogVisible = false
      // 添加成功后，重新获取角色列表的数据
      this.getRolesList()
    },

    // 展示用户编辑的对话框
    async showEditRolesDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('角色信息查询失败！')
      }
      // 把获取到的角色信息对象，保存到编辑表单数据对象中
      this.editRolesForm = res.data
      this.editRolesDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editRolesDialogClosed() {
      this.$refs.editRolesFormRef.resetFields()
    },
    // 编辑角色信息并提交
    editRolesInfo() {
      this.$refs.editRolesFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('roles/' + this.editRolesForm.roleId, {
          roleName: this.editRolesForm.roleName,
          roleDesc: this.editRolesForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('角色信息编辑失败！')
        }
        // 提示用户修改成功
        this.$message.success('角色信息编辑成功！')
        // 属性数据列表
        this.getRolesList()
        // 关闭对话框
        this.editRolesDialogVisible = false
      })
    },

    async removeRolesById(id) {
      // 先 弹框进行询问用户是否删除用户
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除，这返回值是字符串 confirm
      // 如果用户取消删除，则返回值是字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('角色删除失败！')
      }
      this.$message.success('角色删除成功！')
      this.getRolesList()
    },

    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('权限删除失败！')
      }
      this.$message.success('权限删除成功！')
      //   this.getRolesList()
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('权限获取失败！')
      }
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      //   console.log(this.rightslist)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性，则是三级节点
        return arr.push(node.id)
      }
      // 循环当前node里面所有的数组
      // 每循环一下，拿到一个子节点
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      //   console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      //   console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('权限分配失败！')
      }
      this.$message.success('权限分配成功！')
      // 刷新数据
      this.getRolesList()
      // 隐藏对话框
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
